package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.JwtClaimsConstant;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.UserNotLoginException;
import com.sky.mapper.UserMapper;
import com.sky.properties.JwtProperties;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import com.sky.utils.JwtUtil;
import com.sky.vo.UserLoginVO;
import lombok.var;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
public class UserServiceImpl implements UserService {
    @Autowired
    private JwtProperties jwtProperties;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatProperties weChatProperties;
    @Override
    public UserLoginVO login(UserLoginDTO dto) {
        // 利用HttpClient来发送请求, 获取用户的open_id
        // 1. 创建map来存储参数
        Map map = new HashMap();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code", dto.getCode());
        map.put("grant_type", "authorization_code");
        String s = HttpClientUtil.doGet("https://api.weixin.qq.com/sns/jscode2session", map);
        // 2. 对string类型数据进行json格式解析
        JSONObject jsonObject = JSON.parseObject(s);
        // 3. 获取openid
        String openid = (String) jsonObject.get("openid");
        if(openid == null) {
            throw new UserNotLoginException(MessageConstant.ACCOUNT_NOT_FOUND);
        }
        // 判断是否为新用户
        User user = userMapper.selectByOpenId(openid);

        if(user == null) {
            user = new User();
            // 新用户
            user.setOpenid(openid);
            user.setName(openid.substring(0, 5));
            user.setCreateTime(LocalDateTime.now());
            userMapper.insert(user);
        }

        Map<String, Object> claims = new HashMap<>();
        claims.put(JwtClaimsConstant.USER_ID, user.getId());
        // 生成令牌
        String token = JwtUtil.createJWT(jwtProperties.getUserSecretKey(), jwtProperties.getUserTtl()
                , claims);
        UserLoginVO userLoginVO = UserLoginVO.builder()
                .id(user.getId())
                .openid(user.getOpenid())
                .token(token)
                .build();
        return userLoginVO;
    }
}
